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随着采矿深度的不断加深,巷道掘进从围岩较为简单的浅部进入复杂的深部,而对于深部矿井,在矿井建设期开拓掘进时所遇到岩体常为强应力作用下的塑性形变不良岩层,而不是稳定的围岩。通过对金川龙首矿西部贫矿开采平面工程的分析及施工实践验证,总结出巷道从开挖到有效支护,是从一个平衡稳定状态到一个失衡、不稳定状态到另一个平衡稳定状态的相互转换过程,对此转换过程的管理,就是巷道掘进顶板安全管理的核心。临时封闭、临时支护、超前支护、冒顶处理4项有效的技术措施的综合应用,基本解决了在深部矿井高应力,围岩破碎、复杂地质条件下掘进施工的过程中顶板安全隐患技术难题,为深部矿井施工工艺的发展提供了依据。
With the continuous deepening of the mining depth, roadway excavation enters the complex deep from the simpler shallow part of surrounding rock. For the deep mine, the rock mass encountered during pioneering excavation in the mine construction period is often plastic deformation under strong stress Rock formation, not stable rock. Through the analysis of the lean mining plane project in the west of Longchuan mine in Jinchuan and the construction practice verification, it is concluded that the roadway from excavation to effective support is from an equilibrium stable state to an unbalanced and unstable state to another equilibrium stable state Mutual conversion process, the conversion process management, tunnel boring and roof safety management is the core. Temporary closure, temporary support, advanced support, roof treatment of the four effective technical measures comprehensive application of the basic solution to the high pressure in deep mines, rock crushing, complex geological conditions in the process of construction of the roof hidden dangers of technical problems , Provided the basis for the development of deep mine construction technology.